Trimming machine



F. M. FURBER .TRIMMING MACHINE original Filed June 18 191:7 '2 Sheets-Sheet 1 //v l/E/V 727/41 se c. 7, 1926. I

1,598,907 F. M. FURBER 'TRIMMING MACHINE Original, Filed June 18, 1917 2 Sheets-Sheet 2 Patented Sept. 7, 1926.

mnnmroxm. RUBBER, OF1REVERE,JMASSACHUSETTS, ASSIGNOR, BY zMESNE ASSIGN- MENTS, 'ZLO UNITED SHOE MACHINERY CORPORATION, SEY, {A CORPQBATION OFNEW JERSEY.

OF LPATERSON, NEW JEEF TRIMMING MACHINE.

Application filed June 18, 1917, Serial No. 175 221. Renewed November 19, 1920. Serial 110. 425,291.

This invention relates to machines for operating on boots and-shoes, and 1s illustrated, by way of example, as embodied in a machine for trimming the edges of the .soles of shoes. 1

The soles of a large :proportion of shoes have three distinct profiles, one in the fore part, another at'the inner :edge of'the shank, and the third at the outeredge of the shank. The inner edge 0f the shank; :is usually undercut, whereas :theouteredge is usually,

if not always, square and differs from the edge of the forepart in that the latter is H slightly beveled at the .tread surface and in some cases has oneor twoornamental beads. "Consequen'tly,three-different cutters arerequired to trim the edgeiof the sole of every 7 shoe which-is to have the aforesaid characteristics;

For reasons known to those conversant with manufacturing conditions it has not heretoforebeen feasible to perform allthree of the aforesaid trimming operations with one handling-of a shoe.

to the fact that no way, so far as I know, has heretofore been discovered to include three cutters in a single organization withthe-difficulty of turning out high grade work. Accordingly, an object-of this invention is 'to provide an'fimproved organization by which'all three-of these or analogous operations may' be advantageously performed with only one handling of the shoe.

edge-trimming operation requires great skill, and it is necessary to arrange. the cutters so that the operative may present the shoe to them with the'least possible muscular effort, since the quality of the work depends not only upon the accuracy of the operatives eye and judgment but also upon the skill with which he manipulates the shoe. Theseconsiderations require arrangingfthe cutters so that the operative may remain standlngorsitting, as the case.

may be, in one position where he can readily manipulate the shoe I at different stations This has been due for successive operations without losing slghtof the workinglocality, without sacrificingcontrol or safetyand without feeling undue fatigue or strain.

In view of, these considerations, and .to

attain :the aforesaid, object in accordance with a feature of the lnvention, the illustrated machine comprises, as usual, two

cutter shafts one of which carries a cutter .afor trimmlng the forepart and the other of which carries a cutter for trimming the inner edge ofrthe shank, butthe latter shaft also carries a third cutter which may be used to trim the outer edge of \the shank. Furthermore, slnce two of; the cutters are carried by one shaft and each of them must clear :the shoe while the other is operating, to provide for mutualexclusiveness of operi ation, theinvention provides for relative imovement thereof in one direction to aflord such clearance and relative movement in the opposite direction to locate these two cutters so close to eachother'that although the shoe occupies one station for operation "by one of them, and another station for operation by the other, these stations will be so close to each other as'to relieve "the operative from all difficulty of presenting the shoe atthree different stations.

.Again, while the aforesaid relative movement of the two coaxial cutters provides for clearance of the shoe by one of them while the other is operating, clearance :by

the latter while the one is operating is insured by giving one a relatively large di' ameter and the other a relatively small diameter. Thus, two :factors,name1y, relative movement of these cutters and a substantial difference in diameter, provide for mutual exclusiveness of operation without appreciably affecting the conditions under which theoperative presents the shoe to first one and then the other.

These and other features of the invention comprising various combinations and arrangements of parts will be best understood and appreciated from the following description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings, in which 7 Figure 1' is a side elevation partially broken away of the machine illustrating the use of one cutter,

' Fig. 2is-a rear-elevation, and

Fig. 8 is a detail of the machine as shown at Fig. 1 illustrating the use of another cutter.

The main frame 10 of the machine caries a shaft 12. This shaftis compound and comprises an inside shaft 14 and a preferably concentric sleeve 16 which has a longitudinal slot at 18. The sleeve 16 fits within the bearings 20 which abut upon the pulley 22. This pulley is pinned to the internal shaft l t by a pin 24: which passes through the longitudinal slot 18 in the sleeve 16. The sleeve 16, therefore, can be moved longi tudinally of the internal shaft 1 f, but is driven with it by the engagement of the pin 24: with the edge of the slot 18. Upon the end of the shaft 14: is a shank cutter and upon the end of the sleeve 16 is mounted a shank cutter 28. The shank cutter 26 is of small diameter and is shown of curved profile and is shaped to undercut the'inside edge of the shank of the shoe. The cutter 28, as shown, is of larger diameter than the cutter 26 and may have a straight profile, to impart a square cut to the outside edge of the shank.

The sleeve 16 projects beyond the end of the internal shaft ll and projects from the back of a machine. It has mounted on it a collar 30 which is engaged by a shifting yoke 32 of any desired construction mounted upon the end of a bell crank lever pivoted on a bracket 35 mounted on the main frame. The other end of the bell crank has a handle 36 which can be moved by the operator. When the handle is moved down the bell crank 3% will move the sleeve 16 toward the front of the machine carrying the cutter 28 to the full line position shown in Fig. 1. When the handle 36 is raised the sleeve 16 will be retracted and the cutter 28 will be moved to the dotted line position shown in Fig. 1.

When it is desired to trim the outside of the shank the shoe is placed in the position shown in Fig. 1 with the shank in engagement with the cutter 28. This cutter bein of larger diameter than the cutter 26 ant the upper of the shoe overhanging the shank very little upon the outside, the cutter 26 will not strike the upper of the shoe while the cutter 28 is trimming the shank. Wl1en the inside of the shank is to be trimmed, the cutter 26 is used and it will be clear from the dotted lines of Fig. 3 that the cutter 28, if left in that position, would scar the heel breast as the cutter 26 approaches the rear end of the shank because of its greater diameter. This is avoided by moving the cutter 28 back to the full line position in Fig. 3 where-it will clear the shoe.

The upper part of the machine frame, as shown, carries a shaft 38 upon which may be mounted the forepartcutter. In the operation of the machine the operator will trim one side of the shank of the shoe on the cutter 26 as shown in Fig. 3, the cutter 28 being crawn back out of the way, will then run around the forepart with the forepart trinuner and will then move the cutter 28 forward to its operative position and trim the outside of the shank. Although the station at which the shoe is presented for operation by the cutter 28 is not quite the san'ie as that in which it is presented to the Cutie 2 the difference is scarcely perceptible to the operative, since the distance between these stations is reduced to a negligible magnitude by shifting the cutter 28 to its operating position. If it is desired to shift the cutter 28 only once for each shoe it may be left in its operative position for the nextshoe, in which case the operative will use it before he uses the cutter 26, thus using these two cutters in reverse order for successive shoes but in the same order for alternate shoes.

lily compound driving shaft presents a mechanical feature of considerable importance. Inasmuch as the inside shaft 1 1- and the sleeve 16 rotate together, they balance in rotation as one rotating member. Absolute concentricity of tee two, considered separately, is therefore not of great importance. The two parts are carefully fitted together, the outside of the sleeve and the projecting end of the shaft 1st are then concentrically ground, and the compound shaft and cutters will then run true even if the enclosed portion of the shaft 14: is off cen ter. This feature is of considerable practical importance, as it would be mechanically impossible to produce commercially the concentricity which would be requisite if the two cutter carrying members were to rotate independently.

The presence of theslot 18, which unbalances the system to some extent, can be compensated for by slotting the other side of the sleeve, as shown at e0, after the grinding, the amount of metal cut away being such as to balance the shaft and cutters perfectly.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A machine for operating on shoes compil -111g two tools arranged to operate, each exclusively of the other, on a shoe located one st' 'on for one of them and at another sta...on for the other, and means arranged to snift one of said tools in one direction to clear the shoe while the other is operating and in. the opposite direction to reduce the distance between said stations for operation of said one.

A. machine for operating on shoes compris ng two tools arranged to operate, each exclusively of the other, on the edge of the sole of a shoe located at one station for one [llQlllalltl at another station for the other,

and means arranged to shift one of said tools in one direction to clear the shoe while the other is operating and in the opposite direction to reduce the distance between said stations for operation of said one. v

3. A machine for operating on shoes comprising two rotary tools arranged in coaxial relation to operate, each exclusively of the other, on a shoe located at one station for one of them and at another station for the other, and means arranged to shift one of said tools in one direction to clear the shoe while the other is operating and in the opposite direction to reduce the distance between said stations for operation of said one.

4. A machine for operating on shoes com prising two rotary tools of different diameters arranged in coaxial relation to operate, each exclusively of the other on the edge of the sole of a shoe located at one station for one of them and at another station for the other, and means arranged to shiftone of said tools in one direction to clear the shoe while the other is operating and in the opposite direction to reduce the distance between said stations for operation of said one.

5. A machine for operating on shoes comprising two rotary cutters of diiferentdiameters arranged in coaxial relation to operate, each exclusively of the other, on the edge of the sole of a shoe located at one station for one of them and at another station for the other, the smaller one of said cutters being shaped to undercut the shank of the sole, and means arranged to shift said cutters relathe distance between said stations for opera- 1 tion of said larger one.

6. A machine for operating on shoes com-.

prising wo rotary cutters a ranged to operate, each exclnsivelyof the other, on the edge of the sole of a shoe located at one station for one of them and at another stationfor the other, one of said cutters being shaped to undercut the shank of the sole, and means arranged to shift the other one of said cutters in one direction to clear the shoe while said one is operating and in the opposite direction to reduce the distance between said stations for operation of said other.

7. A machine for operating on shoes comprising two rotary cutters of different diameters arranged in coaxial relation to operate,

each exclusively of theother, on the edge of the sole of a shoe located at one station for one of them and at another station for the other, the smaller one of said cutters being operating and in the opposite direction to reduce the distance between said stations.

in testimony whereof I have signed my name to this specification.

FREDERICK M. FURBER. 

